KR100363458B1 - Lens-mounted photographic film unit and flash unit for use in it - Google Patents

Abstract

The present invention relates to a lens-fitted photo film unit having an electronic flash device with a printed circuit board 173. The flash device includes a flash light emitter 6,170 that emits light toward a subject, and main capacitors 31,155 that store charge discharged to the flash emitter. The printed circuit board converts the current of the batteries 12 and 127 into a high voltage current supplied to the main capacitor. The printed circuit board has oscillation transistors 13 and Tr1. The primary coil 15 has one end connected to the battery and the other end connected to the collector of the transistor. The secondary coil 16 is inductively coupled with the primary coil, one end of which is connected to the main capacitor and the other end of which is connected to the base of the transistor. The tertiary coil 17 is inductively coupled with the secondary coil, one end of which is connected to the battery and the other end of which is connected to the base of the transistor. The LEDs 21 and 180 have a cathode connected to one end of the tertiary coil in the battery and an anode connected to the other end of the tertiary coil opposite the battery. The LED emits light when the main capacitor is charged to the specified level. In a preferred embodiment, the photo film unit is preloaded with a photo film 123 having a sensitivity of ISO 800 or higher so that the main capacitor has a small capacitance suitable for high sensitivity photo film.

Description

Photo film unit with lens and flash unit for use

The present invention relates to a lens-mounted film unit and a flash device for use therewith, and more particularly, to a lens-mounted photo film unit in which the electronic flash device is structurally simplified.

Lens-mounted photo film units are commercially available for anyone who enjoys taking pictures. The photographic film unit includes a film housing provided with a simplified photographing apparatus and prefilled with photographic film. There are various types of photo film units provided with additional functions, for example, the model "FUJICOLOR QUICK SNAP FLASH" (trade name: manufactured by Fuji Photo Film Co., Ltd.) equipped with an electronic flash device.

The flash device generally includes a flash circuit having a main capacitor and a neon lamp connected to one end of the capacitor. When the main capacitor is charged to the specified level, the neon lamp is driven to indicate the ready state of flash light.

Instead of the neon lamps, it is conventionally known to use light emitting diodes (LEDs) connected in the flash circuits shown in FIGS. 40 and 41. Since LEDs are inexpensive compared to neon lamps, they are advantageous to be applied to lens-mounted photo film units that require low cost.

The typical flash circuit of FIG. 40 comprises a transistor 640 and a transformer 641 forming a self-starting blocking oscillator known in the electronic flash art. The primary side current flows through the primary coil 641a to alternately increase and decrease. This generates high voltage alternating current in the secondary coil 641b. This alternating current is rectified by the diode 642 to charge the main capacitor 644. In the three coils 641a-641c of the transformer 641, the counter electromotive force is generated when the primary current changes from increasing to decreasing. A light emitting diode (LED) 643 indicating whether flash is possible to light is connected to both ends of the tertiary coil 641C so that the counter electromotive force is applied to the LED 643 in the forward direction.

In the generation period of the counter electromotive force, the LED 643 emits light so that the potential difference between the cathode and the anode becomes larger. As shown in FIG. 42A, at the start of charging, the oscillation frequency of the blocking oscillator is low (about 1 KHz). The absence interval of back EMF is long, while the generation period of back EMF is short. Even when LED 643 is electrically ON, it appears visually that LED 643 is off. As the voltage of the main capacitor 644 increases, the load on the secondary coil 641b increases and the oscillation frequency of the blocking oscillator increases. Thus, two consecutive light emission intervals through the LED 643 become shorter and shorter. LED 643 emits very faint light.

When the voltage of the main capacitor 644 reaches the specified level, the light emitting interval of the LED 643 is very short, about 10 KHz. The light emission visually continuously and brightly emits light, indicating whether the flash device can emit light. The flash circuit of FIG. 40 is suitable for timely informing whether the flash can be emitted by changing the light emission state of the LED 643 by using a change in the oscillation frequency during charging. Another conventional flash circuit shown in FIG. 41 is also similar to FIG.

In a flash circuit that emits an LED when back electromotive force is generated, faint emission of the LED appears immediately at the start of charging of the main capacitor. This has a problem that the user of the photofilm unit may misjudge that the main capacitor can emit light before reaching the prescribed voltage level. As the LED's light becomes progressively brighter, there is no significant change even when the main capacitors reach the specified voltage. This makes it impossible to indicate when the flash can be emitted. In addition, there is a disadvantage that the LED does not emit very bright light even when the main capacitor reaches a specified level because the LED emits light in a short time when the counter electromotive force occurs.

In addition, there is a problem that a part of the current flowing through the tertiary coil flows to the base of the transistor. This reduces the current flowing in the tertiary coil, affecting the oscillation operation and undesirably lengthening the charging time. An additional resistor can be used to divide the charge voltage of the main capacitor so that this divided voltage is applied to the LED which emits light when the charge voltage of the main capacitor reaches a specified level. However, this concept is not very good because the main capacitor is discharged through a resistor or LED.

An object of the present invention is to provide a lens-mounted photographic film unit equipped with an electronic flash device, which can be used as a light emitting diode (LED) for displaying a light emission completion without adversely affecting voltage increase or clear recognition. do.

Another object of the present invention is to provide a lens-mounted photographic film unit having an electronic flash device of a small size.

Another object of the present invention is to provide a lens-mounted photo film unit having an electronic flash device with improved convenience of reuse.

Still another object of the present invention is to provide a photo film unit having an electronic flash device in which red eye is prevented even when the flash is emitted.

It is another object of the present invention to provide a lens-mounted film unit having an electronic flash device in which the flash tube can be moved by a simplified structure.

It is still another object of the present invention to provide a lens-mounted photo film unit having a photographic film that allows a user to visually identify a plurality of frames without mistake of recognition after exposure and development.

In order to achieve the above object, there is provided a flash circuit board including an oscillator connected to a set of power sources and converting a current into a high voltage current supplied to a main capacitor. The oscillator includes an oscillation transistor.

The primary coil is connected between the power supply and the collector of the transistor. The secondary coil is inductively coupled to the primary coil and connected to the base of the main capacitor and the transistor. The secondary coil is inductively coupled to the tertiary coil and connected to the power supply and the base of the transistor. The light emitting diode is connected in parallel with the tertiary coil, has a cathode connected to one end of the power supply side of the tertiary coil, and emits light when the charging voltage of the main capacitor is reached.

In the present invention, the light emitting diode (LED) can be used without a problem that affects the oscillation during voltage boosting. The LED recognizes the ready indication and emits a bright light.

In a preferred embodiment, the photographic film has a sensitivity of ISO 800 and above, such that the main capacitor has a small capacitance to adapt to high speed photographic film.

The main capacitor in the flash device, together with the photographic film with ISO 800 or higher sensitivity, has the minimum capacitance required given the film's sensitivity and the desired effective distance of the flash. This makes it possible to reduce the size of the main capacitor without changing the effective range of the flash light as compared to that loaded on the photographic film unit with the ISO 400 film that is commonly used. It is also possible to reduce the size of the flash device and the size of the photo film unit. This small main capacitor has the advantage of shortening the charging time of the flash unit.

In addition, the flash light emitting unit includes a discharge tube for generating the flash light, a reflector arranged behind the discharge tube to concentrate the flash light from the discharge tube toward the front, and a transparent protector disposed in front of the discharge tube to protect the discharge tube. And a light emitting unit unit in which the flash light emitting unit and the main capacitor are integrally formed. Fixing means for detachably fixing the light emitting unit to the flash circuit board are arranged. Connection means for electrically connecting the light emitting unit between the flash circuit boards are arranged, which are fixed together with the light emitting unit by the fixing means.

Due to the high defect rate, the light emitting unit and the main capacitor, which are difficult to reuse, are integrated into the light emitting unit, which is electrically and mechanically combined with the printed circuit board separately. Therefore, it is easy to separate the light emitting unit from the printed circuit board. The light emitting unit and the printed circuit board can be inspected separately from each other. Methods of inspecting these other parts can be appropriately designed for each part. The speed of inspection can reduce the inspection time of the reuse process. If the light emitting unit is found to be defective, another new unit can be applied to achieve effective reuse in the flash device. There is another advantage of the light emitting unit: the flash device can be manufactured to have high productivity. The light emitting unit is assembled by a manual assembly process. This is simple and efficient in assembling the light emitting unit and the printed circuit board produced separately from each other.

In another preferred embodiment, the light emitting portion is installed in the film housing in such a way that the light emitting portion is moveable when d ≥ r and when not used, d <r, where d is the distance between the center of the light emitting portion and the optical axis of the photographing lens. r is the radius of the virtual circle centered on the optical axis of the photographing lens and satisfying the following equation;

Where GN is the guide number of the flash unit.

The light emitting unit is installed to be moved so that its center is located in the virtual circle during non-flash photography and outside the virtual circle during flash photography. The virtual circle defines the optical axis circumference of the photographing lens and represents a range in which red-eye phenomenon can occur. . This prevents the red-eye phenomenon from occurring during flash photography and makes it possible to have a compact shape of the photo film unit when shooting without the flash.

In a modified embodiment, the light emitting portion is rotatably provided in the main capacitor.

The light emitting portion is directly installed in the columnar main capacitor so as to be rotatable around it. No complicated parts for operating the light emitting portion are required.

The flash device can be configured compactly and inexpensively. In contrast, there is JP-A (Japanese Patent Laid-Open No.) 6-43535, which is consistent with US Patent Application No. 859,993, in which a movable light emitting part is presented. This patent requires many parts to move the light emitting portion. The size of the flash device cannot be reduced and is expensive. Difficult to handle when assembling the camera. In the present invention, the light emitting unit is formed integrally with the discharge tube, the reflecting acid and the diffusion plate, and is installed on the main capacitor to form a flash device together with the printed circuit board. This simplified flash device is easy to handle when assembling the camera. The light emitting portion is rotatable between a storage position stored in the film housing and a position projecting out of the film housing. In order to prevent the occurrence of red eye, it is possible to position the optical axis of the flash light away from the optical axis of the photographing lens.

The lens-mounted photographic film unit also includes a cassette preloaded in a film housing on the right side of the photographing lens as viewed from the rear side. The photographic film is previously pulled out of the cassette, rolled up with a roll, and loaded on the left side of the photographing lens when viewed from the rear. The winding mechanism is installed in the film housing in combination with the trailer of the photographic film and is operated to wind the frame of the photographic film into the cassette after each exposure. The corner numbers of the first row are recorded on the photographic film as latent images and are positioned at at least one upper and lower margin outside the effective photographing screen in the width direction of the film, and are formed at the pitch of the frame and are oriented backwards in the direction of the film housing.

The photographic film unit includes a photographic film having a vertical orientation in which the corner number is the same as the image recorded in the effective photographed image. Therefore, it is possible for the customer to accurately determine the corner number without mistakes.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In Fig. 1, the lens-mounted photographic film unit incorporating the flash device is composed of a film housing 1 having a photographing mechanism having a simple structure and a photographic film built in advance. Generally the film housing 1 is covered with a cardboard box 2. The cardboard box 2 has an opening through which the photographing lens 3, the finder 4, the film winding wheel 5, and the like are exposed to the outside. The film housing 1 covered with the cardboard box 2 can perform a photographing operation.

The photographing lens 3 is disposed at the front center portion of the film housing 1. The finder 4 is positioned above the photographing lens 3. On the right side of the finder 4, the light emitting portion 6 is located. In the lower part of the light emission part 6, the push button 7a for ON / OFF operation of the flash charging switch 7 (refer FIG. 2) is provided. On the upper surface of the photo film unit, a shutter button 8, a display window 9 for displaying the number of remaining films, and a display window 10 for confirming the completion of flash charging are provided.

The flash circuit is shown in FIG. The booster 11 is composed of a battery 12, an oscillation transistor 13, an oscillation transformer 14, a flash charge switch 7, and a rectifier diode 18. The sound 12 has an electromotive force of 1.5V as a power source for the flash circuit. The booster 11 also includes a charge completion indicator 20 indicating the completion of charging of the flash device. Transistor 13 and oscillation transformer 14 constitute a self-starting blocking oscillator to convert a low voltage direct current into a high voltage current.

The oscillation transformer 14 is composed of primary coils 15, secondary coils 16 and tertiary coils 17 which are mutually coupled. In the oscillation transformer 14, two terminals of the primary coil 15 are the first terminal 14a and the second terminal 14b. One end of the secondary coil 16 is the fifth terminal 14c and the other end of the secondary coil 16 is the fourth terminal 14d which is one end of the tertiary coil 17 and a shared terminal. The other end of the tertiary coil 17 is the third terminal 14e.

The positive terminal of the battery 12 is connected to the second terminal 14b of the primary coil 15, and the collector of the transistor 13 is connected to the first terminal 14a. The positive terminal of the battery 12 passing through the resistor 19 is connected to the third terminal 14e of the tertiary coil 17 and the positive terminal of the transistor 13 passing through the flash charge switch 7 is connected to the fourth terminal 14d. The base terminal is connected.

The emitter of the transistor 13 is connected to the negative terminal of the battery 12 and grounded (GND), and is connected to the plus side of the flash discharge unit 30, that is, the plus terminal of the main capacitor 31. The negative terminal of the flash discharge unit 30, that is, the negative terminal of the main capacitor 31 is connected to the fifth terminal 14c of the secondary coil.

The base of the transistor 13 is provided with a base voltage through the resistor 19 and the tertiary coil 17 when the flash charge switch 7 is turned on. The base current flows to the base for the transistor 13 to operate. Oscillation is shown by increasing the base current from the oscillation transformer 14 to positive feedback. During the oscillation operation of the transistor 13, a high voltage is generated in the secondary coil 16 according to the ratio of the number of turns of the primary coil 15 and the secondary coil 16. Only the secondary current flowing in the direction of the fourth terminal 14d in the danner 14C is supplied to the flash discharge unit 30. When the collector current, that is, the primary side current is saturated and the counter electromotive force is generated in the oscillation transformer 14, no current flows in the rectifying diode 18 in the direction from the fourth terminal 14d to the fifth terminal 14c.

The third terminal 14e through the resistor 22 is connected to the cathode of the light emitting diode (LED) 21 in the charge completion display unit 20, and the fourth terminal 14d is connected to the anode. The LED 21 is a GaP type that emits red light and has a characteristic of emitting light in response to application of a forward voltage VF of 1.8V. This voltage VF is referred to below as a rise voltage. The resistor 22 is suitable for adjusting the magnitude of the current flowing in the LED 21 and has a resistance value of 10-22 mA.

The LED 21 is driven by the potential difference between the connection points A and B, where the connection point A connects the anode to the fourth terminal 14d and the connection point B connects the resistor 22 to the third terminal 14e. When the potential of the emitter of the transistor 13 is referred to as the reference (potential 0, that is, GND), the potential Vb of the connection point A is lowered while the counter electromotive force of the oscillation transformer does not occur. The LED 21 does not emit light until the main capacitor 31 reaches the specified charging voltage, which is caused by the potential difference Va-Vb between the connection points A and B being too small or a reverse voltage applied to the LED 21. Because. In addition, the LED 21 emits light indicating that the flash can emit light in response to the application of the forward voltage above the rising voltage VF unless the counter electromotive force occurs when the main capacitor 31 reaches the specified charging voltage. do.

The connected LED 21 is not affected by the oscillation operation, which means that the LED 21 does not emit light in response to the ON state of the flash charging switch 7 and the forward current of the LED 21 is supplied to the transistor 13. Because it is not. The LED 21 is disposed inside the display window 10, and visually confirms whether light is emitted through the display window.

Note that the LED 21 does not emit light when the counter electromotive force occurs in the oscillation transformer 14. When the main capacitor 31 is charged above the prescribed charging voltage, the LED 21 emits light intermittently. However, the intermittent time due to the back EMF is shortened so that the LED 21 appears to emit light continuously in the human eye.

The flash discharge unit 30 is composed of a main capacitor 31, a trigger capacitor 32, a synchronous switch or a trigger switch 33, a trigger transformer 34, a trigger electrode 35, a discharge tube 36, and the like. The secondary current rectified in the booster 11 is supplied to the flash discharge unit 30 and charged to the main capacitor 31 and the trigger capacitor 32. The synchronous switch or trigger switch 33 turns ON as soon as the shutter blades are all open to discharge the trigger capacitor. The current discharged from the trigger capacitor flows to the primary side of the trigger transformer 34 to apply a high voltage to the trigger electrode connected to the secondary side. When a high voltage is applied to the trigger electrode, Xe gas is ionized in the discharge compartment 36 so that positive and negative electrodes are emitted from the insulation, and the main capacitor 31 is discharged so that the discharge tube 36 emits light. In the photographic film unit, the minimum level of charging voltage of the main capacitor 31 was measured at 270V in proper flash photography, preferably 290V or more.

The operation of the flash circuit will be described below. The photographer rotates the take-up wheel 5 of the photo film unit and charges the shutter to prepare for shooting. When flash photography is required, the push button 7a is pressed to turn on the flash charging switch 7. The pressed state of the flash charge switch 7 is maintained until it is confirmed that the LED 21 shown by the display window 10 emits light.

When the flash charge switch 7 is turned on, the base current flows through the resistor 19 and the tertiary coil to the transistor 13 so that the transistor 13 is operated. When current flows in the third coil 17, electromotive force is generated along the primary coil 15. In response to this, the primary coil current starts flowing from the second terminal 14b toward the first terminal 14a. The current on the primary side is the collector current of the transistor 13. In addition, when the primary side current starts to flow, a high voltage electromotive force is generated in the secondary coil 16 so that the secondary side current flows from the fifth terminal 14C toward the fourth terminal 14d. Secondary current flows. The secondary side current flows to the base of the transistor 13 to further increase the collector current from the primary coil 15.

In the transistor 13, the base current is increased by positive feedback of the transistor 13 and the oscillation transformer 14. The collector current of the transistor 13, that is, the primary side current, is increased. When the transistor 13 is saturated, the collector current is also saturated and constant. As the primary current does not change (increase), counter electromotive force is generated in the respective coils 15-16 of the oscillation transformer 14. The counter electromotive force sharply drops the potential Va of the base of the transistor 13 so that the potential Va is lower than that of the emitter. The base current of the transistor 13 decreases rapidly to zero so that the collector current (primary side current) does not flow.

The electromotive force generated in the oscillation transformer 14 becomes zero. The potential of the base of the transistor 13 is higher than that of the emitter. When the base current flows again, the collector current can flow through the transistor 13. Similar positive feedback action of the transistor 13 and the oscillation transformer 14 causes the collector current to increase from the second terminal 14b of the primary coil 15 to the first terminal 14a. The electromotive force is generated in the secondary coil. The secondary current flows in the direction of the fourth terminal 14d from the fifth terminal 14c. In this way, the oscillation operation continues.

The secondary side current flows in the direction from the fifth terminal 14C to the fourth terminal 14d together with the high voltage electromotive force generated in the secondary coil. During the oscillation operation, the secondary side current is supplied to the flash discharge unit 30 to charge the main capacitor 31 and the trigger capacitor. Even with the counter electromotive force generated in the secondary coil 16, the current from the fourth terminal 14d to the fifth terminal 14c is not supplied to the flash discharge part by the rectifying diode 18.

Based on the potential GND (potential OV) of the emitter of the transistor 13, FIG. 3 shows the base and emitter of the transistor 13 while the potential Va of the junction A is not generated in the oscillation transformer 14. It is shown that the potential difference between them becomes larger and becomes constant. The potential Vb becomes higher than the potential Va at the connection point A when the voltage of the main capacitor 31 immediately becomes zero immediately after the charging of the main capacitor 31 immediately starts. Thus, a reverse voltage is generated for the LED 21 which does not emit light when no current flows.

The voltage between the terminals of the main capacitor 31 increases while the main capacitor 31 is being charged. In fact, in the flash circuit of the present invention, subcharging is performed on the main capacitor 31. The potential of the positive terminal of the main capacitor 31 maintains OV while the potential of the negative terminal drops. While the main capacitor 31 is being charged, the cathode potential of the rectifying diode 18, that is, the potential of the fifth terminal 14c is lowered. Under the electromotive force of the secondary coil, the secondary current decreases. Since the secondary coil 16 is inductively coupled with the tertiary coil 17, the reduction of the secondary side current lowers the electromotive force of the tertiary coil. The potential Vb of the connection point B connected to one end of the tertiary coil 17 is generally low. When no counter electromotive force is generated, the potential Vb of the connection point B becomes lower than the potential Va of the connection point A so that the forward voltage is applied to the LED 21. However, before the main capacitor 31 reaches the prescribed charging voltage, the potential difference Va-Vb is too small to accommodate the rising voltage VF required for the LED 21 to emit the LED. Therefore, the LED 21 does not emit light.

When the main capacitor 31 reaches the specified charging voltage of 270V, as shown in FIG. 3B, unless back electromotive force occurs (Va-Vb) is equal to or slightly larger than VF-R.IF, where IF is an LED. It is the magnitude of the current flowing through the LED 21 and the resistor 22 when a forward voltage is applied to the 21. In other words, it is the magnitude of the current flowing through the resistor 22 at the potential difference Va-Vb. In other words, the rising voltage VF (= 1.8 V) of the LED 21 is obtained by subtracting R · IF of the voltage drop of the resistor 22 from the potential difference Va-Vb. Since the voltage is applied to the LED 21 in the forward direction, the LED 21 emits light.

Immediately after the main capacitor 31 reaches the specified voltage, the rising voltage VF causes the current IF of about 1-10 mA to flow through the LED 21 to flow so that the light emission output is small and emits light dimly.

Upon further charging of the main capacitor 31, the voltage reaches almost 290V and the potential Vb at the junction B becomes lower. The potential difference Va-Vb becomes large. A forward voltage of 2.0 V or more is applied to the LED 21. Since the forward current IF of the LED 21 becomes 10 mA or more, the LED 21 emits light brightly and stably. The LED 21 does not emit light when the back electromotive force occurs, but the period of emitting light is longer compared with the period of not emitting light. The LED 21 flashes at high speed because the oscillation frequency is very high when the main capacitor 31 has reached or exceeded the prescribed charging voltage.

The photographer releases the flash charging switch 7 after confirming the light emission of the LED 21 through the display window 10. After the release of the push operation, oscillation is stopped to stop charging of the main capacitor. In response, the light emission of the LED 21 is stopped. Press the shutter button to activate the shutter blades. When the shutter blades are all opened, the sync switch or trigger switch 33 is turned on. The trigger capacitor is discharged. The high voltage is applied to the trigger electrode 35. In response, the main capacitor 31 is discharged to cause the flash discharge tube 36 to emit light. It is possible that imaging is performed at the time when the main capacitor 31 reaches the prescribed charging voltage and the LED 21 emits light.

4, 5A and 5B are graphs of the results of measuring changes in the charging voltage of the main capacitor 31 and the potentials Va and Vb of the flash circuit. 4 shows the relationship between the charging voltage of the main capacitor 31 and the charging time, in which the flash charging switch 7 is turned on at time T0 and turned off at time T1 after the LED 21 emits light. 5A and 5B show the change in the transition Va of the connection point A and the potential Vb of the connection point B. FIG. 5A shows the change immediately after the start of charging. FIG. 5B shows the change when the main capacitor 31 is charged to 290V. The change is shown. The normal use of the flash device for the measured exposure was considered: temporarily charging the main capacitor before the measurement; Flashing the flash device; The main capacitors were measured after recharging. In FIG. 4, the voltage of the main capacitor was higher than OV. The waveform of the potential Vb in FIG. 5A is lower than the potential Va after the start of charging of the main capacitor 31. In the potential measurement of the connection points A and B, the potential (GND = OV) of the emitter of the transistor 13 was used as a reference.

The LED 21 used a rising voltage (VF) of 1.8 V as a GaP type. The main capacity 31 used a capacitance of 90 mu F, and the battery 12 as a power source used an unused voltage of 1.5 V. In the oscillation transformer, 11: 240: 2 was used as the winding ratio of the primary coil 15, the secondary coil 16, and the tertiary coil 17.

In the measurement, as shown in Table 1 below, the time required for the main capacitor 31 to have voltages of 270 V (regular charging voltage), 290 V and 300 V, and the amount of light emitted by the flash discharge tube 36 when the main capacitor 31 was discharged. (GN: guide number) was obtained:

Table 1

As shown in FIG. 1, the main capacitor 31 of this flash apparatus reached the charge voltage of 270V only 2.5 seconds after the flash charge switch 7 was turned on, and then the LED 21 started emitting light at that time. Only 3.1 seconds after the flash charging switch 7 was turned on, the charging voltage of the main capacitor 31 became 290V. The potential difference (Va-Vb) between the connection points A and B at the charge voltage of 290V was 2.20V, which causes the LED 21 to emit light with no blur. The LED 21 is turned off before the main capacitor 31 reaches the specified voltage. The dimmed light emission of the LED 21 having at least the specified voltage lasts only a short time, for example 0.6 seconds, followed by a thick light emission, which allows the user to clearly determine whether flash light is possible.

The rising voltage VF of the LED 21, the winding ratio of the oscillation transformer 14, the resistance value R of the resistor 22, and the capacitance and the specified voltage of the main capacitor 31 are not limited by the above embodiments and are required. The amount of light emitted from the flash device, the voltage of the power supply, etc. may be appropriately changed according to the specifications of each part.

In the above embodiment, the LED 21 is driven by the potential difference between the connection points A and B. Alternatively, it is possible to ground the anode of the LED 21 as shown in FIG. Similar reference numerals have been given to those similar to the above embodiments. In comparison with the above, the potential on the anode side of the LED 21 is low in relation to the potential difference between the emitter and the base of the transistor 13. The number of turns of the tertiary coil 17 or the rising voltage VF of the LED 21 is set to be comparable to the anode side potential of the LED 21. The LED 21 emits light when the main capacitor 31 reaches the specified charging voltage. This flash circuit is advantageous in reducing the load of the LED 21 because the reverse voltage applied to the LED 21 at the time of generation of counter electromotive force can be reduced.

Another preferred embodiment of the present invention is described below, in which the size of the flash device is reduced by varying the size of the main capacitor to make the overall size of the photo film unit smaller.

In FIG. 7, the lens-mounted photo film unit 101 is composed of a photo film housing 102 in which a photographing mechanism of a simple structure is incorporated. In general, the film housing 102 is covered with a cardboard box (103). The photographing lens 104 is installed at the front center of the film housing 102. The objective window 105 of the finder is positioned on the photographing lens 104. The light emitting unit 106 is located on the right side of the objective window 105. A push button 107 is disposed below the light emitting unit 106 to turn on / off the flash charging switch 128 (see FIG. 9). On the upper surface of the photo film unit 2, a shutter button 108, a counter window 109 for displaying the number of films remaining in the photo film 123, and a display window 111 for the neon lamp 110 for displaying flash charging This is arranged. The neon lamp 110 is turned on when the main capacitor is sufficiently charged to the specified voltage. The film winding wheel 112 is arrange | positioned at the back surface of the film housing 102. As shown in FIG. The cardboard box 104 has an opening for making the photographing lens 104, the object window 105, the film winding wheel 112, and the like visible to the outside.

As shown in FIG. 8, the film housing 102 includes a film containing portion 113, a photographing portion 114, a flash device 11, a front cover 116 and a rear cover 117, all of which are Is attached by a hook connection of a releasable form. The film containing portion 113 has a cassette containing chamber 122, a film roll chamber 124, and an exposure chamber 125 provided between the cassette containing chamber 122 and the roll chamber 124. The cassette containing chamber 122 contains the cassette envelope 121 of the photo film cassette 120. The roll chamber 124 is a roll 123a of the photographic film 123 previously pulled out of the cassette shell 121. The photographic film 123 uses a high sensitivity film of ISO 800.

The cassette shell 121 and the roll 123a are respectively accommodated in the cassette containing chamber 122 and the roll chamber 124 before the rear cover 117 is fixed to the back side of the film containing portion 113 by hook connection. The cassette containing chamber 122, the roll chamber 124, and the exposure chamber 125 are sealed so that light may not enter. The photographing unit 114 and the flashing device 115 are assembled on the front of the film containing unit 113. The contact of the UM-3 type 1.5V battery 127 and the flash charge switch 128 is installed in the film containing portion before the front cover 115 is finally attached.

On the front of the picture taking unit 114, a lens fixture 131 is installed to serve as a shutter cover. The photographing lens 104 is fixed to the photographing unit 114 by attaching the lens cover 133. A disk-shaped liquid crystal plate (LCD) 135 is disposed between the lens fixture 131 and the photographing lens 104 to adjust the aperture of the photographing lens 104. The LCD 135 includes a donut or ring-shaped transparent electrode defining a central portion. During normal shooting without using the flash light, the donut-shaped portion 135 becomes opaque to limit the aperture of the photographing lens 104. In flash photography, a predetermined voltage is applied to the electrodes of the LCD 135 to make the donut-shaped portion 135a transparent so that the aperture of the photographing lens 104 is fully opened.

The LCD 135 is connected to the flash circuit of the flash device 115 as shown in FIG. The flash circuit includes a booster 141 and a flash discharge unit 142. The booster 141 uses a blocking oscillator well known in the electronic flashlight field. The blocking oscillator includes an oscillation transistor 143, an oscillation transformer 144, and a half wave rectifier diode 145. Upon release of pushbutton 107, flash charge switch 128 is pressed to short printed contacts 147 and 148. At this time, the transistor 143 is turned on. The oscillation transformer 144 is operated to allow a current to be supplied to the flash discharge circuit 142 via the rectifying diode.

The flash discharge unit 142 includes a neon lamp 110, a trigger capacitor 151, a trigger transformer 152, a synchronous switch or a trigger switch 153, a flash discharge tube 154, and a main capacitor 155. The trigger capacitor 151 and the main capacitor 155 are charged with current from the booster 141. The neon lamp 110 emits light when the main capacitor 155 is charged to a predetermined level, for example, 300V.

A tab is disposed on the secondary coil side of the oscillation transformer 144. A diode 157 and a capacitor 157 are connected to this tab to form a power supply for the LCD 135. When the main capacitor 155 is sufficiently charged, a prescribed voltage is applied to the electrodes of the LCD 135 to cause the donut portion 135a to change from an opaque state to a transparent state. The printed circuit board 161 of the LCD 135 and the flash device 115 are connected to the lead wires 162 and 163, respectively.

In a preferred embodiment, the photographic film 123 uses a high sensitivity film of ISO 800. The photographic film unit with the flash device 115 has the same flash reach and exposure stop as the photographic film unit using the film of ISO 400. The flash device 115 and the main capacitor 155 may have characteristics as shown in Table 2 below.

TABLE 2

The capacitance of the GN and the main capacitor 155 of the flash device 115 are relative values when the photographic film unit of ISO 400 is viewed as one.

As apparent from Table 2, the flash device 115 can also be miniaturized because the main capacitor 155 can have a smaller size than the conventional one. As the capacitance is reduced, the battery 127 may also use a smaller one than the UM-3 type battery. This also contributes greatly to the miniaturization of the photographic film unit. Charging time can also be shortened, allowing quick flash photography.

The photographing lens 104 has a focal length of 30 mm and a speed of F9. The aperture stop is F: 9 when the LCD 135 is transparent and F: 14 when the donut portion 135a is opaque. As shown in FIG. 10, the diameter of the confusion circle is minimized when the aperture stop part is F: 9 and the shooting distance is 3m, and when the aperture stop part is F: 14 and the shooting distance is 20m in consideration of the focal shift at the stop. This allows the photographing lens 104 to be 2-4 m in the aperture stop f: 6 and 1 m-infinite in the aperture stop f: 14. When the aperture stop is f: 14, the image quality of the captured image is improved by the effect at the time of suspension.

In order to achieve exposure of the flash light, the push button 107 of the photo film unit 101 is first pressed. The contacts 147 and 148 are shorted at the flash charge switch 128. The trigger capacitor 151 and the main capacitor 155 start to charge. The neon lamp 110 starts to flash when the voltage of the main capacitor 155 reaches the specified level. The LCD 135 turns transparent so that the exposure stop is fully open.

Point the photographing lens 104 to an arbitrary subject and then press the shutter button 108 to open and close the shutter blades in the photographing unit 114. In this synchronization, the synchronization switch or trigger switch 153 is shorted. The charge on the trigger capacitor 151 flows to the primary side of the trigger transformer 152. The high voltage generated on the secondary side of the trigger transformer 152 instantaneously lowers the resistance in the flash discharge tube 154. The charge of the main capacitor 155 is discharged through the flash discharge tube 154 so that the appropriate exposure to the subject of about 3 m causes the flash light to be emitted.

It is confirmed that the neon tube 110 does not blink in the picture taking without using the flash. The photographing lens 104 is adapted to the subject without pressing the pushbutton 107. Then press the shutter button 108. In the state where the neon lamp 110 is not flashing, the main capacitor 155 has a charge lower than a prescribed level. The donut-shaped portion 135 of the LCD 135 maintains transparency to quiet the aperture at f: 14. This allows high quality images to be obtained because the focus of the object up to about 1m-infinity is well matched in non-flash photography.

The LCD 135 is driven at the completion of charging of the main capacitor 155 but can drive the LCD 135 at the same time as the flash charge switch 128 is pressed to start charging.

In this embodiment, the aperture is regulated by the use of the LCD. Optionally, an electrochromic panel can be used. Electrochromic panels include a glass plate and a thin film disposed on the glass plate that is reversibly reacted with a current to reciprocate between the colored and colorless states. It is also possible to arrange the LCD or the electrochromic panel behind the photographing lens.

In this embodiment an elastic switch piece is used. Only when the push switch is pressed does the switch contact deform and charge the main capacitor. The main capacitor is not charged when the pushbutton is released from pressing. This eliminates the need to turn off the flash charge switch, which can reduce battery consumption.

In the case of continuous flash photography, it is required to press the push button continuously. It is also possible to make the flash charge switch operable to the ON / OFF position. In such a case, it is preferable to link the popup of the flash emitting part to the ON operation of the flash charging switch so as not to forget to turn off the same charging switch: a manual operation of turning the flash emitting part to the home position turns off the flash charging switch. It is preferable to be combined with the flash charging unit in a method.

Another preferred embodiment in which the aperture is changed at the start of charging of the flash device is described. In FIGS. 11A and 11B, the flash light emitter 170 is slidably installed horizontally with respect to the film housing 171. In non-flash photography, the flash light emitter 170 has a position included in the outline of the film housing 171. As illustrated in FIG. 11A, the aperture lever 172 is inserted into the photographing light path L. As shown in FIG. The aperture hole 172 causes the aperture to have a speed of f: 14.

In flash photography, the flash light emitter 170 slides in a direction protruding from the outline of the film housing 171. The flash charge switch formed between the printed circuit board 173 and the switch piece 74 is turned on to start charging of the flash device. As shown in FIG. 11B, the claws 175 disposed on the side surface of the flash light emitting unit 170 rotate the aperture lever 172 clockwise with respect to the bias of the spring 176 in the photographing light path. Retreat. Therefore, the aperture becomes f: 9.

The LED 180 is disposed at the corner of the flash light emitting unit 170 and controlled to emit light when the charging is completed. In FIG. 12 showing the flash circuit, the LED 180 is in contact between a connection point A on the base side of the transistor Tr1 and a connection point B on the resistor R ₁ side of the primary coil. The LED 180 is connected in series with the resistor R ₂ .

As shown in FIG. 13A, the potential Vb of the connection point B is higher than the potential Va of the connection point A, and thus the LED 180 does not emit light. During charging, the potential Vb of the connection point B gradually decreases until it becomes lower than the potential of the connection point A as shown in FIG. 13B. When the charging voltage of the main capacitor 155 reaches approximately 270V (Va-Vb), VF + R2.IF, where IF is the magnitude of the forward current of the LED 180. At this time, the LED 180 starts emitting light. The current IF has a magnitude of 10 mA or less through the LED 180, which has a small output and emits faint light. When charging the main capacitor 155 further, the voltage rises to near 300V after 0.6 seconds. The potential difference Va-Vb also increases. The forward current IF of the LED 180 is 10 mA or more so that the LED 180 emits stable and distinct light. As described above, the LED 180 can clearly notify the user of the completion of charging and eliminates shooting failure due to lack of light. (Va-Vb) is the potential difference between the connection points A and B. VF is the forward voltage of the LED 180 and R2 is the resistance of 10-22 kHz.

In this embodiment, the flash light emitting part is slidable. Optionally, the flash charging switch may be slidable and the flash light emitting part may be arranged to be fixed. In that case, it is preferable to communicate the slide of the flash charge switch with the aperture lever or the member. In addition, it is also possible to arrange a low-brightness sensor for automatic charging.

The present invention is, of course, also applicable to the photographing lens of the above f value and the photographic film unit having a focal length different from the above. The sensitivity of the photographic film is ISO 800 but may be higher, for example ISO 1600. In that case, the capacitance of the main capacitor can be adapted to the sensitivity of the higher film. In this embodiment the aperture is variable. The invention is also applicable to a photographic film unit in which an aperture is fixed, an ISO 800 film is loaded, and a main capacitor is introduced.

A photo film unit equipped with a flash device that is easy to reuse effectively is described in another preferred embodiment.

In FIG. 14, the flash device 210 includes a substrate portion 211 and a light emitting unit 212. The substrate portion 211 consists of a printed circuit board 215 and a flash circuit of FIG. 15 provided thereon. At the bottom of the printed circuit board 215 is a battery holder having pieces 217 and 218 holding the batteries 216. At the left end of the printed circuit board 215, synchronous contacts 221 and 222, which are disposed on the shutter blade rotational damper and shorted by the shutter blades when rotated, are installed. The upper protrusion 215a of the printed circuit board 215 has three printed contacts 224, 225, and 226. The printed circuit board also has protrusions 227 and 228 facing right. On the front of the printed circuit board 215, a pair of printed contacts 227 and 228, which are shorted during charging, are formed.

A pair of rails 229 integrally formed under the light emitting unit 212 are formed. The light emitting unit 212 is installed on the protrusion 215b by sandwiching an upper portion of the protrusion 215b of the printed circuit board 215. Be sure to The electrical contacts 231, 232, 233 are electrically connected to the contacts 224, 225, 226 of the printed circuit board 215 together with the light emitting unit 212 provided on the protrusion 215b.

The light emitting unit 212 includes a flashing light emitting unit 236 installed in the housing 235 and its front corner. The housing @ 35 includes a main capacitor 238 connected in parallel with the flash discharge tube 240 of the light emitting portion 236, as shown in FIG. The light emitter 236 is made of a transparent plastic protector 242. The flash discharge tube 240 and a known reflecting imager have a front plate of the protector 242 on the protector. Electrical contacts 231, 232, and 233 are installed on the left wall of the housing 235. The electrical contacts 231 and 233 are connected to the positive electrodes of the main capacitor 238 and the flash discharge tube 240, respectively, as shown in FIG. The electrical contact 232 is connected to the trigger terminal of the flash discharge tube 240.

In FIG. 15 showing the flash device, the contacts 227 and 228 are shorted so that the direct current of the battery 216 is converted into alternating current and boosted to high voltage by the oscillation transistor 241 and the oscillation transformer 239. The alternating current is then converted to direct current by the ammeter 243 and then applied to the main capacity 238 via the contacts 224 and 226 and the electrical contacts 231 and 233. When the main capacitor 238 and the trigger capacitor 244 are sufficiently charged, the small neon lamp 245 flashes to inform the user that the charging is complete.

After the sync contacts 221 and 222 are shorted, the charge charged in the trigger capacitor 244 is boosted by the trigger transformer and applied to the trigger terminal of the flash discharge tube 240 via the contact 225 and the electrical contact 232. At the next moment, a portion of the xenon gas inside the flash discharge tube 240 is ionized to lower it in the discharge tube 240 and trigger the flash radiation of the discharge tube 240.

When the flash device 210 is charged, a current of about 40 mA flows through the electrical contacts 231 and 233 and the contacts 224 and 226. During flash emission, little current flows into or out of them. About 4 KV is applied to the electrical contact 232 and the contact 225 at the time of light emission, but there is little or no current. The connection by the contact between the electrical contact 231-233 and the contact 224 is sufficient for the dense current, so the rate of connection failure is low.

As described above, the light emitting unit 212 is installed to be movable above the protrusion 215b of the printed circuit board 215. The electrical contacts 231-233 are non-removable or connected to the contacts 224-226 by contact rather than by welding. In the recovered flash device, the light emitting unit 212 can be pulled in the longitudinal direction of the projection 215b, while the substrate 211 is immovably fixed so that the light emitting unit 212 can be easily connected with the substrate 211. To be separated.

The light emitting unit 212 removed from the flash device 210 is connected to a high voltage constant voltage device and subjected to light emission test. The light emitting unit 212 can be efficiently tested in a short time. In order to test the operation of the substrate portion 211, the substrate portion 211 is connected to a main capacitor of about 1 mu F and a test flash discharge tube, for example. The main capacitor 238 used in the photo film unit has a capacitance of about 160 μF. The test main capacitor causes the substrate portion 211 to be tested in a shorter time than in the light emitting unit unit 212 connected to the substrate portion 211 to be tested.

As a result of the test, the substrate unit 211 and the light emitting unit 212 are reused when there is no abnormality or discarded when there is any abnormality. In general, the substrate portion 211 has been found to be reusable several times. The light emitting unit 212 may be used only about once and may be replaced with a new one without reuse because the front surface of the protector 242 is scratched, dusty, or the main capacitor 238 becomes poor.

In FIG. 16, the flash device 250 includes conductive wires 253, 254, and 255 having rigidities for connecting the light emitting unit 252 and the printed circuit board 251. The ends of the conductive wires 253-255 are bent at right angles to be inserted into the holes 256a, 256b, and 256c formed in the print contacts 257, 258, and 259 of the printed circuit board 251, and then fixed by welding. Since the conductive wires 253-255 are rigid, no fixing support means are required between the printed circuit boards 251 and 255. The light emitting unit 252 is fixed to the printed circuit board 251 only by the conductive wire 253.

In order to separate the light emitting unit 252 from the printed circuit board 251, the solder on the tips of the conductive wires 253-255 is heated and the ends are pulled out of the holes 256a, 256b, and 256c. Thus, the conductive wires 253-255 can be easily separated at the contacts 257-259.

In FIG. 17, the flash device 260 uses the connector 263 to connect the printed circuit board 251 and the light emitting unit 262. Connector 263 includes three plug holes and three conductive wires 267,268 and 269 having rigidity. The light emitting unit 262 has contact pins 264, 265 and 266, which are detachably inserted into the plug holes of the connector 263. The printed circuit board 261 has three print contacts 261a, 261b, and 261c. Conductive wires 267-269 are welded on contacts 261a-261c. In this embodiment, the electrical contact 264-266 has sufficient rigidity to support the light emitting unit 262 on the connector 263 and the printed circuit board 261. When the light emitting unit unit 262 is pulled to the right as shown in the figure, the electric contact 264-266 is easily removed from the connector 263 by being separated from the fixed printed circuit board 261. 261) and light emitting unit 262 are separated.

The flash apparatus of FIGS. 18 and 19 includes four electrical contacts 273, 274, 275 and 276 which connect the printed circuit board 271 to the light emitting unit 272. The light emitting unit 272 is slidably mounted on the printed circuit board 271 having the same structure as in the embodiment of FIG. The electrical contact 271-276 is slidably contacted on the print contacts 281, 282, 283, 284. The electrical contacts 273 and 276 are connected to the electrodes of the main capacitor 283 and the flash discharge tube 240, respectively. The electrical contacts 274 and 275 are connected to the positive terminal of the trigger transformer, respectively. In this connection method, both the voltage and current flowing through the electrical contact 271-276 and the contacts 281-284 are kept low. This embodiment is more preferable than the embodiment of FIG. 14 because only the voltage flowing through the electrical contact 232 and the contact 225 cannot be increased.

In the light emitting unit units as described above, it is preferable that each component is easily connected to and detached from each other by a simple coupling or coupling tool such as a pin. This makes it possible to efficiently exchange parts of the light emitting unit. In the present invention, the reusability of the flash device is improved. In the embodiments of FIGS. 14 and 18 in which the light emitting unit units 212 and 272 are electrically connected to the printed circuit boards 215 and 271 only by contact connection, the light emitting unit units 212 and 272 are movable. Since the light emitting unit units 212 and 272 are moved in a direction away from the photographing lens, the lens-mounted photographic film unit or the compact camera can be simply configured. The flash device having this movable light emitting unit is effective in reducing the so-called red-eye phenomenon in which a human subject, the main subject, is photographed in red due to the flash light.

Instead of the connector 263 of FIG. 17, other types of connectors may be used. For example, two members can be plugged together as connectors.

Another preferred embodiment in which the "red-eye" phenomenon is reliably prevented is described below.

In FIG. 20, the lens-mounted film unit 301 is composed of a photo film housing 302 including a photographing mechanism of a simple structure. In general, the film housing 302 is wrapped in a cardboard box (303). The photographing lens 304 is installed in the film housing 302. The objective window 305 of the finder 324 is positioned on the upper surface of the photographing lens 304. The flash emitter 306 is positioned next to the object window 305. On the upper surface of the photo film unit 301, a shutter button 308, a counter window indicating the number of remaining films in the photo film 323, and a display window 311 for the neon lamp 310 indicating the completion of charging are arranged. The neon lamp 310 is turned on when the main capacitor is fully charged, that is, when the specified voltage is reached. The film winding wheel 312 and the voltage window 313 of the finder 324 are disposed on the rear surface of the film housing 302. The cardboard box has an opening for making the photographing lens 304, the object window 305, the film winding wheel 312, etc. visible.

The film housing 302 as shown in FIG. 21 includes a film containing portion 315, a photographing portion 316, a flashing device 317, a front cover 318 and a rear cover 319, all of which are Is detachably coupled to the hook connection. The film containing portion 315 has a cassette containing chamber 322, a film roll yarn 324, and a dark chamber 325 between the cassette containing chamber 322 and the roll chamber 324. The cassette containing chamber 322 contains the film barrel 321 of the photo film cassette 320. The roll chamber 324 contains the roll 323a of the photographic film 322 previously pulled from the film cylinder 321.

Each of the film cylinder 321 and the roll 323a is light-received in the cassette containing chamber 322, the roll chamber 324 and the dark chamber 325 before the rear cover is fixed to the back side of the film portion 315 by hook connection. Sealed to prevent entry. The picture taking part 316 and the flash device 317 are assembled on the front surface of the film containing chamber 315. The battery 327 is installed on the film containing portion 315 before the front cover 318 is finally attached.

The picture taking part 316 has a plastic base part 328 in which the lens holder 331 is provided on the front side as a shutter cover. The photographing lens 304 is fixed to the photographing unit 316 by attaching the lens cover 333. A shutter driving mechanism, a counter mechanism and a finder are installed at the upper portion of the photo taking part 316. The finder 334 is an inverse Galilea type consisting of the objective concave lens 334a and the eyepiece convex lens 334b.

Between the lens holder 331 and the photographing lens 304 is a disk type LCD 335 for adjusting the aperture of the photographing lens 304. The LCD 335 is connected to the printed circuit board 341 via the lead wires 337 and 338. The LCD 235 is provided with a donut or ring-shaped transparent electrode defining a central hole. When using natural light without flash, the donut-shaped portion 335a becomes opaque to limit the aperture of the photographing lens 304. In flash photography, a predetermined voltage is applied to the electrodes of the LCD 335 to make the donut-shaped portion 335a transparent so that the aperture of the photographing lens 304 is completely opened.

The flash device 317 includes a printed circuit board 341 and a light emitting unit unit 342 slidably mounted thereon. The lower portion of the printed circuit board 341 is provided with a battery holder provided with electrical contacts 343 and 344 for holding the battery 327. At the left end of the printed circuit board 341, there are synchronous contacts 345 and 346, which are arranged on the rotational damping of the shutter blades and are short-circuited by the shutter blades during rotation.

The light emitting unit 342 includes a housing 347 and a flash light emitting unit 306 provided at a front corner thereof. The main capacitor 48 is housed inside the housing 347 and is also connected in parallel with the flash discharge tube 349 of the flash discharge unit 306 as shown in FIG. The flash light emitter 306 includes a protector 350 which is a transparent plastic, a flash discharge tube 349 and a known reflecting acid. The front wall of the protector 350 is a diffuser plate or lens. The button part 347a is integrally formed with the housing 347 and operates to move the light emitting unit unit 342.

22 and 23, three printed contacts 351-353 are formed on the upper portion of the printed circuit board 341 to be electrically connected to the light emitting unit 342, and a pair of short circuits which are short-circuited upon charging thereunder. Print contacts 354 and 355 are formed. A protrusion 341a is formed on the right side of the printed circuit board, and a light emitting unit unit 342 is slidably installed through a leg portion 342a on an upper end thereof. A print contact 356 is formed at the protrusion 341a. In this regard, the electric contact piece 357 is installed inside the corner portion 342a.

The corner part 42a is a passage type which clamps the protrusion part 341a. Each portion 342a has a ridge 358 that engages a hole 359 formed in the printed circuit board 341. Semi-circular grooves 361 and 362 are formed at the upper end of the protrusion 341a so that the protrusion 360 formed in the lower portion of the light emitting unit 342 is engaged with the click.

Brush-type electrical contacts 366, 367, and 368 are formed on the left side of the light emitting unit 342. The short-circuit electric contact piece 369 is fixed to the side surface of each part 342a. The electrical contacts # 66 and 368 are connected to the electrodes of the main capacitor 348 and the flash discharge tube 349. The electrical contact 357 is connected to one end of the main capacitor 348.

At the position where the projection 360 is coupled with the groove 362, the electrical contact 366-368 contacts the contact 351-353 of the printed circuit board 341, thereby causing the light emitting unit unit 342 to contact the printed circuit board 341. Electrical connection. The leading end of the short-circuit metal point piece shorts the contacts 354 and 355 to operate the flash circuit. The contact 356 is in contact with the contact piece 357 to connect the LCD 335 in parallel via the main capacitor 348 and the resistor 370. The flash emitter is positioned at a position to prevent red eye, as will be described later. In the position where the projection 360 is engaged with the groove 361, the light emitting unit 342 is compactly received in the outline of the film housing to block electrical connection with the printed circuit board 341. The LCD 335 deviates from the application of voltage.

The light emitting unit 342 is moved to the right side of the protrusion 341a and the contacts 354 and 355 are shorted by the contact 369 so that the rectification of the battery 327 is driven by the oscillation transistor 377 and the oscillation transformer 378. To be boosted. The alternating current is then converted to direct current by the rectifier 379 and applied to the main capacitor 348 via the contacts 351 and 353 and the electrical contacts 366 and 368.

When the main capacitor 348 and the trigger capacitor 381 are sufficiently charged, a small neon lamp is lit to allow the user to know the charging completion. After the synchronous contacts 345 and 346 are shorted, the charge stored in the trigger capacitor 381 is applied to the trigger terminal of the flash discharge tube 349 via the contact 352 and the electrical contact 67. Next, the flash discharge tube 349 discharges light.

The LCD 335 is connected in parallel with the main capacitor 348 via a resistor 370, a contact 356, and an electrical contact 357. When the neon lamp 310 is turned on, a predetermined voltage is simultaneously applied to the electrodes of the LCD 335. The donut-shaped portion 335a is changed from the opaque state to the transparent state to change the sensitivity of the photographing lens from f: 11.8 to f: 9.4. This is advantageous in preventing red-eye because the flash device 317 can have a small guide number GN necessary for flash photography.

A known method for preventing the occurrence of red eye is described in US Pat. No. 4,051,494, which corresponds to JP-B (Japanese Patent Publication) 58-20021. There, the guide number GN for the ISO 100 photographic film of the flash device satisfies the following equation.

Where d is the distance between the center of the flash emitter and the optical axis of the photographing lens under the condition that the illuminance index of the photographing place is 3 and the photographing distance is within 4 m.

The above equation is an empirical formula for approximating the area without red-eye phenomenon. The values of 0.37 and 0.73 are experimental values and the value of 400 is the shooting distance (4m = 400cm). 2.5 ° represents a limited angle between the line of light extending from the center of the subject's eye and the flash emitter P1 and the light output L1, which align the optical axis L1 of the photographing lens to the center of the eye of the subject, which is mainly human, 2.5 °. Is the minimum value that prevents red-eye.

The photo film unit of this embodiment has the following sensitivity:

Sensitivity of Photo Film 323: ISO 400,

Sensitivity of the fully opened shooting lens 304 (the LCD 335 is all transparent): f: 9.4,

Subject distance: 4m

GN: 8.9

The radius r of the imaginary circle Q1 representing the range in which red-eye occurs is calculated from the following equation derived from the above relationship between GN and d.

In the above formula, GN = 8.9 was substituted and r was measured as 61.6 mm.

In non-flash photography, the distance between the optical axis L1 of the photographing lens 304 and the center P1 of the flash light emitting portion 306 is, for example, 57.6 mm (<61.6 mm = r). The light emitting unit 342 is compactly contained in the outline of the film housing 302 as shown in FIG. 24A. During flash photography, the light emitting unit 342 slides to the right by pressing the button portion 347a as shown in FIG. 24B. The distance between the optical axis L1 and the center P1 is, for example, 69.6 mm (> 61.6 mm = r). Since the center P1 does not generate the virtual circle Q1, the red eye does not occur.

Flash photography with the photo film unit 301 is described below. Initially, the button unit 347a is operated to slide in the direction in which the light emitting unit unit 342 protrudes from the outside of the film housing 302. The projection 360 is released from the groove 361 by the movement of the light emitting unit 342 until it is engaged with the groove 362 or stopped by the groove. The center P1 of the flash emitter 306 is displayed outside the virtual circle Q1. The contact piece 366-368 is in contact with the contact piece 351-353 to electrically connect the flash circuit of the printed circuit board 341 to the light emitting part 342. A tip of the shorting metal contact 369 shorts the contacts 354 and 355 so that charging of the main capacitor 348 and the trigger capacitor 381 is started. The electrical contact 357 contacts the contact 356 so that the LCD 335 is connected in parallel with the main capacitor 348.

When the charging voltage of the main capacitor 348 and the trigger capacitor 381 reaches the prescribed level, it starts to blink with the neon lamp 310. The LCD 335 becomes transparent and the aperture of the photographing lens 304 is fully opened since f: 11.8 is reduced to f: 9.4.

Thereafter, after the predetermined subject is aligned with the finder 334, the shutter mechanism of the photographing unit 316 is operated by pressing the shutter button 308. The shutter blades are opened and closed so that the synchronizing pieces 345 and 346 are shorted in synchronism. The flash discharge tube 349 emits flash light to illuminate a subject within 4 m. The center P1 of the light emitting unit 342 is moved out of the virtual circle Q1 to prevent the red eye from occurring. Accordingly, the eyes of the subject person may be photographed in a normal state.

When no flash photography is required, the light emitting unit 342 enters into the outline of the film housing 302. The center P1 of the flash light emitter 306 is located in the virtual circle Q1, so that the photo film unit 301 can be carried. The light emitting unit 342 is released from the printed circuit board 341 to prevent the battery 327 from being consumed by not being switched off. The electrical contact 357 is in contact with the contact 356. The donut-shaped portion 335a of the LCD 335 becomes opaque to smooth the aperture to f: 11.8. The shutter button 308 is pressed to focus to 1 m-infinity so that natural light photography is possible.

25 to 27 show a method of moving by light emitting unit. The photo film unit 391 of FIG. 25 has a light emitting unit unit 392 which is movable in the vertical direction, and the photo film unit 393 of FIG. 26 has a light emitting unit unit 394 which is rotatable via a hinge 395. The flash emitters 396 and 397 are moved to cause their centers P2 and P3 to go out of the virtual circles Q2 and Q3.

27A and 27B have a light emitting unit 403 installed in the film housing 401 via an arm 402 and hinges 404 and 405. FIGS. The arm 402 has a height similar to that of the film housing 401 so that the light emitting unit 403 can rotate around the hinges 404 and 405. If flash photography is not required, the hole 402a is superimposed on the photographing lens 406. The light emitting unit 403 is placed under the photographing lens 406 to make the photo film unit 400 portable as shown in FIG. 27B.

During flash photography, the light emitting unit 403 stands upright on the film housing 401 so that the center P1 is positioned outside the virtual circle Q4, which prevents red eye. Reference numeral L2 denotes an optical axis of the photographing lens 406.

The photo film unit of FIGS. 27C and 27D has two arms 408 supporting the light emitting unit 409. Elements similar to those in FIGS. 27A and 27B have been given the same reference numerals.

It is possible to remove the hole 402a from the arms of FIGS. 27A and B and form the arm with a transparent plate.

In this example a photographic film of ISO 400 was used. The guide number GN of the flash device is 8.9. Optionally, a high-sensitivity photographic film can be used, where a film of ISO 800 is used, the required GN is 6.3 and the radius of the virtual circle is 50.5 mm, less than 61.6 mm. This has the advantage of reducing the size of the photographic film unit. In the above, the LED is used to tighten the aperture. Optionally, the aperture can be adjusted to the use of additional aperture mechanisms. The aperture mechanism can be separated from the light emitting unit. However, it is preferable to combine the light emitting unit with the aperture mechanism to change the aperture in response to the movement of the light emitting unit. In this embodiment, the LCD is connected in parallel with the main capacitor via a switch comprising contacts and electrical contacts. Optionally the LED can be connected in parallel with the battery.

28 and 31B show another preferred embodiment. FIG. 28 shows a lens-mounted photo film unit 430 equipped with a flash device 410. The film housing 431 is mainly made of plastic and covered with a cardboard box 432. The cardboard box 432 has a pattern printed with ornaments to form the appearance of the photographic film unit. The cardboard box 432 has an opening such that the photographing lens 433, the finder 434, the shutter button 435, the winding wheel 436, the counter window 437, and the flash light emitter 412 are visible. The film housing 431 together with the film housing 431 wrapped in the cardboard box 432 can be used to achieve exposure.

As shown in FIG. 29, the film housing 431 includes a film containing portion 441, a front cover 442, and a rear cover 443. The photographing unit 444 is positioned in front of the film containing unit 441. The flash device 410 is positioned on the top surface of the film containing portion 441. The photographing unit 444 and the flash device are sandwiched between the front cover 442 and the rear cover 443.

In FIG. 30, the flash device 410 includes a substrate 411 and a flash light emitter 412. The substrate portion 411 is composed of a printed circuit board 413 having a control circuit for controlling charging and discharging. A battery holder 415 for fixing the battery 414 and a synchronous contact 16 shorted by the operation of the shutter blade are installed on the substrate. At the top of the printed circuit board 413 is a conical main capacitor attached horizontally through the terminals 417a and 417b by welding. The flash charging switch 418 is disposed under the main capacitor to operate the charging circuit of the main capacitor 417. The flash charge switch 418 consists of two pieces 418a and 418b, the former having a shorter length and the latter having a longer length, protruding from the edge of the printed circuit board 413. The contact pieces 418a and 418b are in contact with each other in a natural state.

The flash emitter 412 includes a housing 421, a flash discharge tube 422, and a reflective mountain 423, as shown in FIGS. 31A and 31B. The diffuser plate 424 is attached to the front of the opening of the housing 421. The upper wall of the housing 421 is flat and has a groove 425 at its rear end. The rear portion of the housing is formed with a conical opening 421a equal to the diameter of the main capacitor 417. Terminals 417a and 417b have a diameter sufficient to have strength undeformed and operate to keep main capacitor 417 horizontal. The main capacitor 417 is used as the rotation axis of the flash light emitter 412. The flash emitter 412 is positioned in contact with the contact piece 418b of the flash charge switch 418. When the flash light emitter 412 is rotated toward the lower side of the front surface, the lower surface of the housing 421 presses the contact piece 418b to turn off the flash charging switch 418. When the flash light emitter 412 is rotated, the contact piece 418b is released from the pressing of the housing 421 to turn on the charging switch 418. The main capacitor 417 is filled with a charge for flash emission. When the synchronous contact 416 is shorted according to the opening and closing operation of the shutter blade, the charge of the main capacitor 417 is discharged to the flash discharge tube 422 emitting the flash light.

The front cover 442 and the rear cover 443 have support portions 445, 446a, and 446b, which have curved portions associated with the contours of the main capacitor 417 and clamp the main capacitor 417 at their horizontal ends. Cutouts 443a and 442a are formed in the rear covers 443 and 442 so that the upper portion of the light emitting portion 412 is visible. The flash device 410 is rotatable between the non-use position and the use position. When the flash device 410 is in the non-use position, the flash light emitter 412 is embedded in the film housing 321 as shown in FIG. 31A. When the flash device 410 is in the use position, the front surface of the light emitting portion 412 protrudes above the film housing 431.

Hereinafter, the operation of assembling the flash device 410 will be described. Initially, the substrate portion 411 and the flash light emitting portion 412 are assembled separately. The main capacitor 417 is inserted into the opening 421a of the flash light emitter 412. The terminals 417a and 417b are attached to the printed circuit board 413 by welding. Thereafter, the substrate portion 411 and the flash light emitting portion 412 are integrated into the flash device 410, which is easy to handle.

The assembled flash device 410 is transferred to the photo film unit 430 assembly process and assembled to the film housing 431. To this end, a photo taking part 444 and a flashing device 410 are positioned in front of the film containing part 441. The flash device 410 is composed of a single member and can be easily and simply installed on the film containing portion 441. After the battery is inserted into the battery holder 415, the front cover 442 and the rear cover 443 are fixed on the film containing portion 441. The supports 445, 446a, and 446b fix the main capacitors so that the flash device 410 is fixed to the film housing 431. The side surface of the flash light emitter 412 is in contact with the inside of the film housing 431 to prevent the terminals 417a and 417b from receiving a large force in the direction of the terminal. The axis of rotation of the flash light emitter 412 is stable. The flash light emitting portion 412 of the flash device 410 is directed to the non-use position of FIG. 31A when assembled.

The user rotates the film winding wheel 436 to the limit position where it stops when shooting with the photographic film unit 430. Then charge the shutter to prepare for shooting.

During flash photography, the user touches the groove 425 of the flash light emitter 412 on the photo film unit 430 and presses a trailing edge thereof. The flash emitter 412 is rotated to protrude to the top above the film housing 431. The optical axis 422a of the flash light is moved from the flash discharge tube 422 to the position of the upper surface of the film housing 431. The flash emitter 412 rotates around the main capacitor 417 having a sufficiently large diameter. The ends of the main capacitor 417 are fixed by the supports 445, 446a, and 446b. The flash light emitter 412 may be stably rotated even by a small force. When the flash light emitter 412 comes to the use position for flash light emission, the swivel 418b is released from being pushed by the housing 421 so that the flash charge switch 418 is turned on to charge the main capacitor 417.

The user places the subject at an appropriate position and presses the shutter button 435. The shutter blade is opened and closed to short the synchronous contact 416. The charge of the main capacitor 417 is applied to the flash discharge tube 422 to emit flash light so that the subject is irradiated. The optical axis 422a is moved above the film housing 431 to be positioned away from the optical path by the photographing lens 433 from the subject. This prevents the occurrence of red eye and obtains a good subject image.

After the flash photography is completed, the flash charge switch 418 is kept ON until then. After the flash discharge, the main capacitor 417 is recharged. No special charging operation is required to recharge the flash unit. Flash shooting can be continued by simply pressing the shutter button 435 together with the charged shutter.

At the end of flash photography, the upper surface of the flash light emitter 412 is pressed to move to the unused position shown in FIG. 31A. The lower portion of the flash light emitter 412 presses the contact piece 418b downward. Flap 418a is released in contact with fold 418b to turn flash charge switch 418 off. The main capacitor 417 is stopped from charging. The diffuser plate 421 moves to a position partially covered in the film housing 431. The diffusion plate 424 effectively prevents the photo film unit 430 from being damaged while being carried.

The improvement of the number of corners recorded on the photographic film in connection with the lens-mounted photographic film unit is described below.

A typical photographic film used in the photographic film unit is 135 films embedded in a cassette. As shown in FIG. 43, the photographic film cassette includes the film barrel 605 and the photographic film 602 provided with the spool 603 and the film entrance 604. It is arranged on the right side of 607 and has a structure in which a roll of the photographic film 602 from the film barrel 605 is arranged on the left side of the photographing lens 607. After photographing, the spool 603 of the film barrel 605 is rotated so that one frame of the photographic film 602 is wound around the film barrel 605. The photographing procedure of the photographic film 602 in the photographic film unit is from the film rear end 608 in the spool 603 toward the film front end 609 at the free end.

In a typical camera, the film barrel 605 and the photographic film are shown in FIG. 44, and the film barrel 605 is disposed on the left side of the photographing lens 611, and the tip end of the photographic film 602 from the film barrel 605. Has a structure wound around the spool 612 on the left side of the photographing lens 611. After the photographing is performed, the photographic film 602 is wound one frame around the spool 612. The photographing order of the photographic film 602 is from the film leading end 609 toward the film rear end 608.

The photographic film 60 has latent images of the corner number 615 located outside the effective shooting screen 614. The corner number 615 is disposed from the film front end 609 toward the film rear end 608 and is directed in a manner similar to the posture of the image recorded on the effective shooting screen 614 in a vertical manner. The photographic film 602 after photography is cut into six frames at the photographic flash point. The printed photo is stored in a storage case and provided to the customer. Since the corner number is similar to the direction of the image on the negative film, the corner number can be easily read at the time of extra printing.

However, such a photo film unit has a problem of being inverted with respect to the image direction of the effective photographing screen 614 in the direction of the corner number 615 because the arrangement of the photo film and the cassette embedded therein is opposite to that of the camera. It may be wrong to read the corner number because the picture is placed normally when the user is ordered additional prints.

Another problem is that the actual shooting order is the inverse of the order of corner numbers. For example, when multiple frames look almost similar, such as when shooting the results of an experiment or when shooting the same subject continuously at regular intervals, frames may be erroneously read even if you do not want them for further printing. This is a common problem with "pre-wind" type cameras, but it is very serious for lens-mounted film units that are consumed in large quantities.

Preferred embodiments for solving these problems are described below. FIG. 32 illustrates the lens-mounted photo film unit 520 of which the overall thickness is thinned. The film housing 521 has a built-in photographing apparatus and is covered with a cardboard box 522. The cardboard box 522 is a form in which the film winding wheel 523, the flash light emitting part of the flash device 524, and the shutter button 525 are visible. The cardboard box 522 also has the same opening for making the photographing lens 526, the finder 527 and the frame counter window 528 visible.

The film housing 521 shown in FIG. 33 has a roll chamber 531 containing a photo film 530 and a cassette containing chamber 533 containing a cassette. The film housing 521 includes a main body 534, a front cover 535, and a rear cover 538. The main body 534 is assembled with a photographing mechanism. The front cover 535 covers the front of the body 534. The rear cover 538 covers the rear surface of the body 534 and includes leads 536 and 537 covering the lower portion of the roll chamber 531 and the cassette containing chamber 533.

An aperture 540 is formed between the roll chamber 531 and the cassette containing chamber 533 to define the exposure range of the photo film 530. An image is recorded on the effective photographing screen on the photographic film 530 via this aperture 540. An engaging portion 523a protrudes from 523 on the upper wall 533a of the cassette containing chamber 533. Engagement portion 523a includes teeth formed on the outer periphery of the column and engages with the teeth formed inside the top of spool 541 of cassette 532.

In order to load the photo film 530 into the film housing 521, the photo film 530 is first pulled from the cassette 532 and wound as a roll as shown. The length of pulling the photo film 530 is accurately measured by calculating the perforations of the photo film 530. The photo film 530 is engaged when the spool 541 of the cassette 532 is engaged with the film winding wheel 523. This is precisely positioned in the film housing 521 because the engagement portion 523a has the precision of the dental pitch to maintain the drawing length of the photo film 530 which does not change even in the fine rotation of the spool 541. The position of the effective photographing screen and the frame number of the photographic film is not changed so that the photographic film 530 is accurately positioned when loaded into the film housing 521.

The photographic film cassette used for the photographic film unit 520 has a printed indication of "lens mounting film unit only" on the outer circumferential surface as shown in FIG. In the upper and lower margins of the photographic film 530 outside the effective shooting screen 544, the edge number for the frame 547 is turned upside down from the film front end 545 toward the film rear end 546 on the spool 541. ) The latent image is recorded.

Corner number 547 is formed by exposing the photo film 530 in synchronization with the conveyance of the photo film 530 at the time of manufacture of a light source such as a light emitting diode. The photo film 530 when not in use has a latent image of corner number 547 which is completely invisible. After the photo film 530 is developed, the corner number 547 may be recognized.

The operation of the above embodiment will be described below. The user who purchased the photo film unit 520 determines the composition through the finder 527. The shutter button 525 is pressed and the film winding wheel 523 is rotated to capture the entirety of the event film 530. Each image is focused on the photographic film 530 through the photographing lens 526. The latent image of the subject recorded on the photo film 530 is upside down similar to the inverted corner number.

After all the photographic film 530 has been photographed, the user leaves the photographic film unit 520 at the photographic flash store. The user usually requires both phenomena and printing. At the flash point, the cardboard box 522 is removed from the film housing 521 and the finder 527 is opened to take out the photo film 530 and the cassette 532 wound therein. The cassette 532 has a mark "lens mounting film unit" so that an operator can easily identify the cassette used in the camera. This is convenient when the seal elapses after the cassette 532 is taken out and another worker develops the photographic film 530.

The cassette 532 is installed in the film processor to develop the film 530 of the cassette 532. Next, the film 530 is installed in a print / processor to print each frame. Printed photographs are stored in a storage case. The photo film 530 is cut into six frames and stored in a film case and returned to the user. The vertical orientation of the image of the effective shooting screen 544 coincides with the corner number 547 when placing the order to place additional orders. Therefore, there is no possibility that the corner number 547 can be misread in relation to the effective shooting screen 544.

The corner number 547 is positioned on both the upper and lower sides of the effective shooting screen 544, but may be formed only on the upper and lower sides of the effective shooting screen 544. In addition, the corner number 547 may be normally formed on one of the upper and lower sides instead of upside down. This is preferable because a corner number written normally can be correctly recognized in a frame even when used in a general camera.

Hereinafter, various embodiments of the photographic film will be described. In FIG. 35, the corner number 549 is placed upside down and inverted from the rear end portion 546 of the photographic film toward the front end portion 545. FIG. The order of the corner number 549 and the actual shooting order are the same. This is convenient, for example, when taking photographs of experiments or when taking the same subject continuously at regular intervals to make you look similar on film. Since the corner number 549 coincides with the effective photographing screen 544, there is no fear of incorrectly recognizing the corner number 549. Corner number 549 is located both above and below the effective shooting screen, but may be formed on either side. In addition, it can also form on either side normally, not upside down. This is preferable because evenly used edge numbers can be correctly recognized in a frame even when used in a general camera.

36, another embodiment of a photographic film is shown. The corner number 551 is disposed on the effective photographing screen 544 and upside down while the number of the rear end portion 546 also increases in the film leading end portion 545. The corner number 552 is disposed below the valid shooting screen 544 and normally as the number increases from the film rear end 546 toward the leading end 545. The positions of the corner numbers 551 and 552 may be interchanged. In addition, instead of the corner number 551, the upper corner number may be normally formed instead of upside down. This is preferable even when applied to a general camera, since the corner numbers written normally in accordance with the shooting order can be correctly recognized in the frame.

Another embodiment of a photographic film is shown in FIG. The alphabet display 554 is disposed upside down on the effective shooting screen from the film leading end 545 toward the rear end 546. The corner number 555 is formed below the effective shooting screen and upside down while the number increases from the film rear end 546 toward the front end 545. The positions of the alphabet display 554 and the corner number 555 can be interchanged. Alphabetical representation 554 and corner numbers may be arranged in reverse order.

Another embodiment of a photographic film is shown in FIG. The alphabet display 557 is normally disposed on the effective photographing screen 544 in the order from the film leading end 545 to the rear end 546. The corner number 558 may be formed upside down under the effective photographing screen as the number increases from the film rear end 546 toward the front end 545. The positions of the alphabet display 557 and the corner number 558 may be interchanged. In addition, the alphabet display 557 and the corner number 558 may be formed in reverse.

Figure 39 shows another embodiment of a photographic film. Corner numbers 560 and 561 are disposed on the effective photographing screen as the numbers increase from the rear end portion 546 toward the front end portion 545. Corner number 560 is normally arranged while corner number 561 is arranged backwards. The positions of the corner numbers 560 and 561 may be interchanged. Positions of corner numbers 560 and 561 are located at the side edges of each frame. Serious problems arise when a frame is recorded at a position away from corner numbers 560 and 561. However, in the present invention, as described in the above embodiment, such a problem never occurs because the photographic film is loaded at a position not to be separated from the photographic film unit. A pair of corner numbers may be formed below the effective photographing screen 554, but not below. It is possible to match the inverted corner numbers with respect to the effective photographing screen to each normally formed corner number. In addition, instead of the edge number 560, it is possible to form a corner number normally formed toward the rear end portion 546 from the film tip portion 545.

Although the invention has been described in detail based on the preferred embodiments with reference to the accompanying drawings, it will be apparent to those skilled in the art that many modifications can be made. Accordingly, such modifications without departing from the scope of the present invention should be considered to be included within the scope of the present invention.

1 is a perspective view showing a lens-mounted photographic film unit.

2 is a circuit diagram of a flash device introduced into a photo film unit.

3A and 3B are graphs illustrating the change in potential of the light emitting diode and the light emission time of the diode.

4 is a graph showing the result of measuring the relationship between the voltage of the main capacitor and the charging time.

5A and 5B are graphs showing the results of measuring the potential change of the light emitting diodes.

6 is another preferred circuit diagram of a flash device in which the anode of the light emitting diode is grounded.

7 is a perspective view showing another preferred embodiment of the lens-mounted photo film unit.

FIG. 8 is an exploded perspective view of the photo film unit shown in FIG.

9 is a circuit diagram of a flash device having a liquid crystal plate.

10 is a graph showing the relationship between the shooting distance and the diameter of the confusion circle.

11A and 11B are explanatory perspective views of another photographic film unit having a stop-down lever.

12 is a flash circuit diagram of the photographic film unit shown in FIGS. 11A and 11B.

13A and 13B are graphs illustrating the change in potential of the light emitting diode and the light emission time of the diode.

14 shows another flash device that can be reused.

FIG. 15 is a circuit diagram of the flash device shown in FIG.

16 to 18 show another flash device.

19 is a circuit diagram of the flash device shown in FIG.

20 is a perspective view showing another embodiment of the lens apparatus photographic film unit.

FIG. 21 is an exploded perspective view of the photographic film unit shown in FIG. 20. FIG.

22A and 22B are plan views illustrating the relationship between the printed circuit board and the light emitting unit of the flash apparatus.

FIG. 23 is a circuit diagram of the flash device shown in FIGS. 22A and 22B.

24A and 24B are explanatory front views illustrating the movement of the flash-light emitting unit to the virtual circle and the center position.

25 and 26 are illustrative front views illustrating another preferred photographic film unit.

27A and 27B are explanatory views of another photographic film unit in which the flash device can be rotated around the upper edge of the film housing.

27C and 27D are explanatory diagrams of another photographic film unit, which are partially similar to those in FIGS. 27A and 27B.

28 is a perspective view of another preferred lens-mounted photo film unit.

FIG. 29 is an exploded perspective view of the photo film unit shown in FIG. 28;

30 is an exploded perspective view showing the flash device of the photo film unit shown in FIGS. 28 and 29. FIG.

31A and 31B are sectional views showing the rotational state of the flash-light emitting unit.

32 is a perspective view of another lens-mounted photo film unit.

33 is an exploded perspective view of the photo film unit shown in FIG.

34 is an explanatory diagram of a photographic film having a cassette previously mounted in the photographic film unit.

35 to 39 are explanatory views of another photographic film pre-mounted in the photographic film unit.

40 and 41 are circuit diagrams of a conventional flash device including a light emitting diode.

42A and 42B are graphs illustrating the change of the light emitting diode potential and the light emission time of FIG. 40 according to the prior art.

43 is an explanatory diagram showing the relative positions of the conventional photo film, cassette and lens in the photo film unit.

44 is an explanatory diagram showing the relative positions of the photographic film, cassette, and lens conventional in a generally available camera.

Claims (46)

Film housings (1,102,171,302, 391,400,431,521) in which unused photographic films (123, 323, 530) are preloaded include a photographing device and an electronic flash device (11,30,115,210,270,317, 410,524), and the photographing device includes a photographing lens (3,104,304,433,526) and a shutter mechanism. A flash light emitting unit (6,106,170,236,306, 396,397,407,412) driven in response to the operation of the shutter mechanism to emit light toward the subject within a predetermined distance of the flash device; A flash circuit board (161,173,215,251,261,271,341,411) having a main capacitor (31,155,238,348,417) and a flash circuit for regulating the charging of the main capacitor and the flash emission of the flash emitter, wherein the photographic film is a high sensitivity ISO 800 film and the main capacitor is suitable for high sensitivity film. Lens-mounted photographic film for small capacitance Unit. The aperture control device (135; 172, 175) according to claim 1, wherein the aperture control device (135; 172, 175) disposed in the optical path (L) defined through the photographing lenses (3,104,304,433,526) for setting the aperture of the non-flash photographing lens smaller than the aperture of the flash photographing lens. 335) further comprising a lens-mounted photo film unit. 3. An aperture stop according to claim 2, wherein said aperture adjuster comprises an aperture plate movably in said optical path and provided away from said optical path and provided with an aperture hole smaller than said imaging lens, wherein the aperture hole sets a smaller aperture during non-flash photography. A lens-mounted photographic film unit that is positioned in the light path so that a smaller aperture is fully open during flash photography. 4. The lens-fitted photo film unit according to claim 3, wherein the aperture adjusting device (172, 175) sets the aperture smaller in flash photography in response to the start of charging of the flash device. The method of claim 4, wherein The flash light emitting part is movably installed in the film housing between the used position and the unused position, A charging switch installed on the flash circuit board and closed in response to the movement of the flash light emitting part to a use position to operate the flash circuit so that the main capacitor starts charging; The aperture control device includes a connection mechanism and an aperture plate associated with the flash light emitter, and when the flash light emitter is in an unused position, the aperture plate is moved to an optical path to set an aperture hole in the optical path and when the flash light emitter is in use, A lens-fitted photo film unit for moving the plate away from the light path and setting the aperture to be sufficiently open. 6. The lens-fitted photo film unit according to claim 5, wherein the aperture adjuster (135) sets a smaller aperture in flash photography in response to charging of the main capacitor to a prescribed level. 7. The apparatus of claim 6, wherein the flash circuit board further comprises a power supply circuit in which the main capacitor and the aperture control device are connected in parallel with each other; The aperture control device includes a constant transparent center portion disposed on the axis of the optical path and a peripheral portion disposed around the center portion, wherein the peripheral portion is changeable between an opaque state in non-flash photographing and a transparent state in flash photographing, and the center portion is invisible. Lens-mounted photographic film unit with smaller aperture size for flash photography. 8. The lens-fitted photo film unit according to claim 7, wherein the aperture control device is electrochromic. 8. The lens-fitted photo film unit according to claim 7, wherein the aperture adjusting device is a liquid crystal panel. 3. The oscillator of claim 2, wherein the flash circuit board 173 further includes oscillators 11,181, Tr1 connected to power sources 12,127 for converting current into high voltage currents supplied to the main capacitors 31,155. end, Oscillation transistors 13 and Tr1; A primary coil 15 connected between a power supply and a collector of the transistor; A secondary coil 16 inductively coupled with the primary coil and connected between a main capacitor and a base of the transistor; A tertiary coil 17 inductively coupled with the secondary coil and connected between the power supply and the base of the transistor; And A lens-mounted photographic film comprising a light emitting diode (21,180) connected in parallel with a tertiary coil having a cathode connected to one end of the tertiary coil with a power supply and driven to emit light in response to charging of the main capacitor to a prescribed level. Unit. The oscillator (11) of claim 2, wherein the flash circuit board further comprises an oscillator (11) connected to a power source (12) for converting current into a high voltage current supplied to the main capacitors (31, 155). Oscillation transistor 13; A primary coil 15 connected between a power supply and a collector of the transistor; A secondary coil 16 inductively coupled with the primary coil and connected between a main capacitor and a base of the transistor; A tertiary coil 17 inductively coupled with the secondary coil and connected between the power supply and the base of the transistor; And A light emitting diode having a cathode connected to one end of the tertiary coil with a power supply and an anode connected to the emitter of the transistor, the light emitting diode being connected in parallel with the tertiary coil, which is driven to emit light in response to charging of the main capacitor to a prescribed level. A lens-mounted photographic film unit comprising: 21,180). The apparatus of claim 2, wherein the flash device comprises light emitting unit units 212, 252, 262, and 272 in which the flash light emitting unit 236 and the main capacitor 238 are integrally formed. A flash discharge tube 240 in which the flash light emitting unit generates flash light, a reflection mount disposed at the rear of the flash discharge tube to accumulate flash light of the flash discharge tube facing toward the front, and a flash discharge tube disposed in front of the flash discharge tube to cover the flash discharge tube; The lens-mounted photo film unit including the transparent protector (242). The apparatus of claim 12, wherein the flash device is Fixing parts 215b and 229 arranged to detachably fix the light emitting unit units 212 and 272 to the flash circuit boards 216 and 271; And a connection part (231-233, 273-276) arranged to electrically connect the light emitting unit to a flash circuit board while the light emitting unit is fixed by a fixing part. 14. The apparatus of claim 13, wherein the flash discharge light comprises a cathode, an anode and a trigger electrode, the cathode and anode being connected in parallel to a main capacitor and the trigger electrode is suitable for triggering a discharge between the cathode and the anode; And the contact portion is three electrical contacts protruding from the light emitting unit to connect the cathode, anode and trigger electrodes to the flash circuit board. The method of claim 14, wherein the flash circuit board, A power supply circuit connected to the main capacitor for supplying electric charges; A trigger capacitor connected to the power supply circuit in parallel with the main capacitor via a resistor to store the supplied charge; A trager transformer having a primary coil and a secondary coil inductively coupled thereto; A primary coil connected in parallel with the trigger capacitor via a trigger switch; One end is connected to the trigger electrode and the other end is connected to the negative electrode of the power supply circuit. The trigger switch is turned on to discharge the trigger capacitor so that a current flows in the primary coil, thereby generating a high voltage current through the secondary coil. A secondary coil to which a high voltage is applied to the trigger electrode to release the cathode and the anode from the insulation to discharge the main capacitor; And And a three-piece electrical contact connecting the cathode, anode and trigger electrode to the power circuit and trigger transformer. 14. The apparatus of claim 13, wherein the flash discharge tube comprises a cathode, an anode and a trigger electrode, the cathode and anode being connected in parallel with a main capacitor, the trigger electrode being suitable for triggering a discharge between the cathode and the anode; The flash circuit board, A power supply circuit connected to the main capacitor for supplying electric charges; A trigger capacitor connected to the power supply circuit in parallel with the main capacitor via a resistor to store the supplied charge; A trager transformer having a primary coil and a secondary coil inductively coupled thereto; A primary coil connected in parallel with the trigger capacitor via a trigger switch; One end is connected to the trigger electrode and the other end is connected to the negative electrode of the power supply circuit. The trigger switch is turned on to discharge the trigger capacitor so that a current flows in the primary coil, thereby generating a high voltage current through the secondary coil. A secondary coil to which a high voltage is applied to the trigger electrode to release the cathode and the anode from the insulation to discharge the main capacitor; And And three electrical pieces protruding from the light emitting unit to connect two terminals of the primary coil of the cathode, the anode and the trigger transformer to the power circuit and the trigger capacitor. 13. The flash circuit of claim 12, wherein the flash device further comprises a connector 263 arranged to electrically connect the light emitting unit 262 to the flash circuit board. The lens-fitted photo film unit having at least one terminal 267-269 detachably connected to the terminal 264-266. 13. The flash circuit according to claim 12, wherein the flash device further comprises a plurality of conductive wires (253-255) arranged to electrically connect the light emitting unit (252) to a flash circuit board. A lens-mounted photo film unit having at least one end (257-259) attached by welding to a terminal of the sub unit. 3. The light emitting device of claim 2, wherein the light emitting parts 306, 396, 397, and 407 are installed so that d &gt; r when not used and d &gt; And the distance r is the radius of the virtual circle having a center located on the optical axis of the photographing lens, satisfying the following conditions. Here, GN is a guide number of the flash device. 20. The lens-fitted photo film unit of claim 19, wherein the light emitting portion is slidable horizontally with respect to the film housing. 20. The lens-fitted photo film unit of claim 19, wherein the light emitting portion is slidable vertically with respect to the film housing. 20. The lens-fitted photo film unit of claim 19, wherein the light emitting portion is rotatable between an axis defined in the thickness direction of the film housing and a position not folded horizontally in use a folded position when not in use. 20. The lens-fitted photo film unit of claim 19, wherein the light emitting portion is rotatable between a horizontally defined axis of the film housing and a position that is not folded upward in use and a position that is folded downward in use. 3. The flash discharge tube (422) of claim 2, wherein the light emitting portion (412) generates a flash light, a reflection mountain (423) disposed behind the flash discharge tube for condensing the flash light from the flash discharge tube toward a front surface thereof. And a transparent protector (424) disposed in front of the flash discharge tube to cover the flash discharge tube, the lens mounted photographic film unit being rotatably installed on the main capacitor (417). 25. The apparatus of claim 24, wherein: the protector 424 is a diffuser plate for diffusing flash light from the flash discharge tube and the reflecting acid; The main capacitor is oriented horizontally as a column; And a flashing portion including a bearing portion rotatably mounted around the main capacitor to face forward when the protector is in use and to face downward when not in use. 3. The apparatus of claim 2, wherein the light emitting portion is rotatable around the main capacitor between a use position protruding from the film housing and an unused position embedded in the film housing; It is installed on the flash circuit board, closed in response to the movement of the light emitting part to the use position to operate the flash circuit so that charging of the main capacitor is started, and the light emitting part is opened when the non-use position, that is, the flash circuit is stopped. The lens-mounted photo film unit further comprising a charging switch. 27. The lens-fitted photo film unit according to claim 26, wherein the upper wall of the film housing has an opening that makes the top of the light emitting part visible in appearance, the upper part of the opening being substantially hibernating with the top wall when the flash light emitting part is in the non-use position. The method of claim 2, A cassette 532 which is pre-built in the film housing on the right side of the photographing lens 526 when viewed from the back of the film housing, having a rotatable spool 541; A photographic film having a rear end 546 embedded in the left side of the photographing lens and fixed to the spool when viewed from the rear, which is pre-drawn out of the cassette and wound as a roll; A winding mechanism 523 installed in the film housing in association with the spool and operated so that the frame of the photographic film is wound into the cassette after shooting; Recorded as the latent image on the photographic film and positioned at at least one of the upper and lower bags of the photographic film defined with respect to the width direction of the film out of the effective shooting screen 544 and formed at the pitch of the frame and oriented backwards with respect to the direction of the film housing. A lens-fitted photo film unit further comprising a series of corner numbers 547, 549,551,552,555,558,561. 29. The lens-fitted photo film unit according to claim 28, comprising a display portion indicating that the surface of the cassette is used for the lens-mounted film unit. 29. The lens-fitted photo film unit according to claim 28, wherein the corner number is continuously increased from the leading end to the rear end of the photographic film. 29. The lens mounting according to claim 28, further comprising a frame identification indicator different from the corner number, recorded on a photographic film as a latent image, and positioned at a margin opposite to the corner number with respect to the effective shooting screen and formed at a pitch of the frame. Photo film unit. 32. The lens-fitted photo film unit according to claim 31, wherein the frame identification display portion is oriented upside down with respect to the direction of the film housing as a character. 32. A lens-fitted photo film unit according to claim 31, wherein said frame identification indicator is lettered so that its bottom faces toward the bottom of the film housing. 29. The lens-fitted photo film unit of claim 28, wherein the corner numbers (549,552,555,558,560,561) are continuously increased from the rear end to the rear end of the photographic film. 35. A lens-fitted photo film unit according to claim 34, wherein the winding mechanism is a winding wheel rotatably installed on the film housing and engaged with the spool and wound around the spool in the cassette. 36. The lens-fitted photo film unit of claim 35, wherein the corner number is located on both upper and lower bags outside the effective photographing screen of the photographic film. 36. The apparatus according to claim 35, recorded on a photographic film as a latent image, positioned in a margin opposite the corner number of the first row outside the effective shooting screen, formed at the pitch of the frame, and oriented upside down with respect to the direction of the film housing. And a second row of corner numbers continuously increasing from the leading end of the photographic film toward the rear end. 36. The photographic film of claim 35, wherein the photographic film is formed in the one-pitch frame and is positioned in the margin common to a series of first edge numbers outside an effective shot so that its bottom is generally oriented towards the film housing base. A photographic film unit equipped with a lens that also includes a series of second edge numbers recorded as latent images in the image. Oscillation transistors 13 and Tr1; A primary coil 15 connected between the power supply and the collector of the transistor; A secondary coil (16) coupled between the main capacitor and the base of the transistor and coupled in mutually inductive relationship with the primary coil; And And a tertiary coil (17) coupled between the power source and the base of the transistor in a mutually inductive relationship with the secondary coil. An electronic flash device (11, 30; 115) comprising a flash light emitting portion for emitting flash light toward a photographic field and main capacitors (31, 155) for storing charge to be discharged in the flash light emitting portion; In the flash circuit for converting the current of the power supply (12,127) into a high voltage current to be supplied to the main capacitor, Further comprising a light emitting diode (21, 180) connected in parallel with the tertiary coil, the cathode of which is connected to one end of the tertiary coil with the power supply and is driven to emit light in response to the charging of the main capacitor to a predetermined level. Flash circuit comprising a. Oscillation transistor 13; A primary coil 15 connected between the power supply and the collector of the transistor; A secondary coil (16) coupled between the main capacitor and the base of the transistor and coupled in mutually inductive relationship with the primary coil; And A tertiary coil (17) coupled between the power source and the base of the transistor and coupled to each other in an inductive relationship with the secondary coil; Including A power source for an electronic flash device (11,30) comprising a flash light emitter (6) for firing flash light towards the photographing area and a main capacitor (31) for storing charge to be discharged in the flash light emitter A flash circuit (12) converting a current into a high voltage current to be provided to the main capacitor, A light emitting diode 21 driven to emit light in response to the charging of the main capacitor to a predetermined level, at which its cathode is connected with the power supply to one end of the tertiary coil and whose anode is connected to the emitter of the transistor; Flash circuit further comprising a. A flash light emitter 236 for emitting flash light toward a photographing area, a charge of the main capacitor 238 and the main capacitor for storing charges to be discharged from the flash light emitter, and flash emission of the flash emitter An electronic flash device comprising a flash circuit board (215, 271) having a flash circuit to Light emitting unit units 212 and 272 in which the flash light emitting unit and the main capacitor are integrally formed; A flash discharge tube (240) for generating flash light, a flash including a reflection mount installed behind the flash discharge tube for concentrating flash light forward from the flash discharge tube, and a transparent protector installed in front of the flash discharge tube to cover the flash discharge tube Light emitting unit; Fixing parts (215b, 229) provided for detachably fixing the light emitting part unit to the flash circuit board; And And a connecting portion (231-233, 273-276) provided for electrically connecting said light emitting unit to said flash circuit board while being fixed to said light emitting unit by said fixing portion. A flash light emitter 236 for emitting flash light toward the photographing area, a main capacitor 238 for storing charge to be discharged from the flash light emitter, and a charge of the main capacitor and a flash bladder of the flash light emitter; An electronic flash device comprising a flash circuit board (261) having a controlling flash circuit. A light emitting unit unit 262 in which the flash light emitting unit and the main capacitor are integrally formed; Flash discharge tube 240 for generating flash light Flash emission including a reflective mount installed behind the flash discharge tube to focus the flash light forward from the flash discharge tube and a transparent protector installed at the flash discharge tube voltage to cover the flash discharge tube Wealth; At least one terminal 267-269 thereof includes a connector 263 provided for electrically connecting the light emitting unit to the flash circuit board, the connector 263 being detachably connected to the flash circuit board or the light emitting unit. Electronic flashlight. A flash light emitter 236 for emitting flash light toward a photographing area, a main capacitor 238 for storing charge to be discharged from the flash light emitter, and charging of the main capacitor and controlling flash emission of the flash light emitter In an electronic flash device comprising a flash circuit board 251 having a flash circuit, A light emitting unit unit 252 in which the flash light emitting unit and the main capacitor are integrally formed; A flash tube 240 for generating flash light, a reflection mount installed behind the flash discharge to focus the flash light forward from the flash discharge tube, and a transparent protector installed in front of the flash discharge tube to cover the flash discharge tube (242); And A plurality of conductive wires arranged for electrically connecting the light emitting unit to the flash circuit board, at least one of which ends 257-259 is connected by welding to a terminal of the flash circuit board or to an end of the light emitting unit. Electronic flash device comprising (253-255). An electronic flash device 317 including a photographing device including a photographing lens 304 and a shutter mechanism and a flash light emitting unit 306, 396, 397, 407 driven in response to the operation of the shutter mechanism for emitting flash light toward the photographing area. In the photographic film unit with a lens, in which the photographic film 323 which is not exposed to the film housings 302, 391, 393, and 400 that are included is preloaded, d is the distance between the center of the flash emitter and the optical axis of the photographing lens, and r is the diameter of the virtual circle Q1-Q4 located on the optical axis of the photographing lens, and GN is the guide number of the flash apparatus. The lens is mounted, which includes a flash light emitting part mounted on the film housing in a moving manner in which d? R while using the flash light emitting part that satisfies the condition and d> r when not using the flash light emitting part. Photo film units. Control the flash light emitting unit 412, the charge of the main capacitor 417 and the main capacitor for storing the charge to be discharged in the flash light emitting unit to emit the flash light toward the photographing area and the flash light emission of the flash light emitting unit An electronic flash device comprising a flash circuit board 411 having a flash circuit to A flash discharge tube 422 for generating flash light, a reflection mount 423 provided behind the flash discharge tube for condensing the flash light forward from the flash discharge tube, and a transparent disposed in front of the flash discharge tube to cover the flash discharge tube A flash emitter including a protector, and An electronic flash device comprising a flash light emitting portion rotatably mounted on the main capacitor. A photographing apparatus, and a flash emitter 412 driven in response to the operation of the photographing apparatus to emit flash light toward the photographing region and a main capacitor 417 for storing charge to be discharged in the flash emitter. In a lens-mounted photo film unit in which an unexposed photo film is pre-inserted into a film housing 431 including an electronic flash device including a charging circuit 411 for controlling charging of the main capacitor. A flash discharge tube 422 for generating flash light, a reflection mount 423 installed behind the flash discharge tube for concentrating the flash light forward from the flash discharge tube, and installed in front of the flash discharge tube to cover the flash discharge tube A flash light emitting unit including a transparent protector 424; The flash light emitting portion which is considered rotatable around the main capacitor between a use position where the flash light emitting portion protrudes from the different film housing and an unused position where the flash light emitting portion is held in the film housing; And Mounted on the charging circuit, closed in response to the movement of the flash light emitting portion to the use position to operate the charging circuit to initiate charging of the main capacitor, and the flash light emitting portion stops operation of the flash circuit board. And a charging switch which is opened while in the non-use position of stopping.